If proposition on gay marriage had won on no-Proposition 8--California--what would benefits be to gay couples?

I voted no, as I was against the ban of gay marriage. What exact benefits do gay couples get by being married? A tax break for getting married? Health benefits that they couldn't get just by being a non married couple? What other benefits, besides the union of a man & wife in a church? Would taxpayer's taxes go up if No had ped? Thanks.